for Veterans and the Public
Be careful with dietary supplements
Vitamin and mineral supplements
The best way to get vitamins and minerals is through food. Food provides the greatest range of nutrients. However, a multivitamin/mineral supplement can be helpful, especially if you lose your appetite or can't eat a healthy diet. Folate is particularly important vitamin and is not obtained easily from food but is found in multivitamins.
Before taking any supplement, talk to a doctor or dietitian. If you take supplements, don't exceed the recommended doses. Some supplements in high amounts can be dangerous, particularly fat-soluble vitamins, such as A, D, E, and K. Here are some special concerns:
Iron and Vitamin C
Some people with hepatitis C, particularly those with cirrhosis, have above-average levels of iron in their body. Too much iron can damage organs. If these people take multivitamin/mineral pills, they should take the ones without iron. These pills usually are marketed as formulas for men or adults over 50. These people also should avoid taking large doses of vitamin C because vitamin C helps the body absorb iron.
You do not want to take iron supplements if you have hepatitis C, unless you are specifically told to take iron by your provider.
Vitamin A, if taken in doses larger than the recommended 10,000 IU, can harm the liver. Vitamin A is even more toxic in someone who drinks alcohol.
You won't get too much vitamin A from food, but be careful taking routine dietary supplements with high doses. There's a non-toxic form of vitamin A, present in many fruits and vegetables, called beta-carotene. If you take vitamin A supplements, look for those with beta-carotene.
Vitamin D is important for health in normal amounts (such as diets with plenty of milk). The body also can make vitamin D when exposed to sunlight. Taking supplements of 800 IU of vitamin D daily may help people with poor diets or long winter seasons, or those who are housebound.
Vitamin E supplements do not have benefits, though it used to be believed that Vitamin E prevented heart disease. High doses (greater than 400 IU/day) can have be dangerous.
Vitamin K is involved in blood clotting. It is present in the diet mostly in green vegetables. It also is produced by bacteria in the intestines. Vitamin K supplements generally are not taken, nor are they recommended.
Just because something is "natural" doesn't mean it is harmless. Certain herbs, including Kava-Kava and pennyroyal, can cause liver damage. For a more extensive list of herbal cautions, see Alternative or Complementary Approaches.
Always talk to your doctor before taking megavitamin therapy, herbal products, or any other dietary supplement. Remember, your first concern should be safety.